使用第一个条目填充组合框

我使用以下技术在winforms中填充组合框：

var customer = (new Customer[] { new Customer { CustomerID = -1, CustomerRef = "[Please Select]" } }).Concat(
    from c in ctx.Customers
    orderby c.CustomerRef ascending
    select c).ToList();
cboCustomerRef.DataSource = customer;
cboCustomerRef.ValueMember = "CustomerID";
cboCustomerRef.DisplayMember = "CustomerRef";

是否有可能获得相同的结果，但仅从客户而不是所有列中选择两个相关列（CustomerID 和 CustomerRef）。

有没有更好的方法可以做到这一点？

谢谢。。。

var customers = 
    from c in ctx.Customers
    orderby c.CustomerRef ascending
    select new { CustomerId = c.CustomerID, CustomerRef = c.CustomerRef }).ToList();
customers.Insert(0, new { CustomerID = -1, CustomerRef = "[Please Select]"});
cboCustomerRef.DataSource = customers;
cboCustomerRef.ValueMember = "CustomerID";
cboCustomerRef.DisplayMember = "CustomerRef";